Why can't I chỉnh sửa my poll?

I've tried to add hình ảnh to a phiếu bầu I'd previously made too, and couldn't. My guess is that bạn can't alter the phiếu bầu in any way, to prevent people from changing a phiếu bầu which isn't going their way. It's a bit silly really. I could understand not changing the câu hỏi hoặc the answer option for that reasoning, but altering hình ảnh won't change the phiếu bầu results in any way.

just restart your computer and try again it always works with me
hopefully this helps...

How long cách đây did bạn post the poll? If bạn did it a few hours ago, then it's stuck like it is. If bạn just recently made it then it's a glitch (and a very common glitch from what I've experienced. Happens to me all the time).